Without a doubt, that would be my spouse, Mr. Man. He always denies his need for anything, and when I get a particularly inspired gift idea, he generally doesn't like it or doesn't use it. For example, for is birthday one year I got him an air riveter. When he opened the package, he went on and on about how he had no use for such a thing, and that maybe we could still return it. Of course, shortly after that he started using it all the time to do snowmobile repair and the like.

He is still almost impossible to shop for. I usually just wing it and hope for the best.